Apparatus for generating a detection clock for detecting digital data contained in a composite video signal and a data detector using detection clock
AssigneeSamsung Electronics Co., Ltd.
InventorHak-sung Kim
Life of this patent
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Abstract
A detection clock generating apparatus generates a detection clock signal for detecting digital data contained in the vertical blanking period of a received composite video signal. A slicer generates a slicing reference signal based on the analog clock run-in signal and slices the received analog clock run-in signal by using the generated slicing reference signal. A synchronizing portion synchronizes the sliced data with an internal clock signal. An edge detecting portion detects the rising edges of pulses of the synchronized sliced data and outputs an edge detection signal. A clock generator generates a detection clock signal on based on the pulses of the edge detection signal.
Claims20
An apparatus for generating a detection clock signal for detecting digital data contained in a vertical blanking period of a received composite video signal based on an analog clock run-in signal which has a constant frequency and which is contained in said vertical blanking period of said received composite video signal, said apparatus comprising:
- a slicer for generating a slicing reference signal based on said analog clock run-in signal, for slicing said analog clock run-in signal by using said slicing reference signal, and for outputting sliced data according to said slicing of said analog clock run-in signal;
- a synchronizing portion for receiving said sliced data from said slicer, wherein said synchronizing portion synchronizes said sliced data with an internal clock signal to produce synchronized sliced data and wherein said internal clock signal has a frequency higher than a frequency of said analog clock run-in signal;
- an edge detecting portion for receiving said synchronized sliced data, for detecting rising edges of pulses of said synchronized sliced data, and for outputting an edge detection signal which comprises pulses that respectively correspond to said rising edges;
- and
- a clock generator for receiving said edge detection signal from said edge detecting portion and for generating a detection clock signal based on said pulses of said edge detection signal.
An apparatus for detecting digital data contained in a vertical blanking period of a received composite video signal based on an analog clock run-in signal which has a constant frequency and which is contained in said vertical blanking period of said received composite video signal, said apparatus comprising:
- a slicer for generating a slicing reference signal based on said analog clock run-in signal, for slicing said analog clock run-in signal and subsequently slicing a digitally encoded signal by using said slicing reference signal, and for outputting sliced data according to said slicing of said analog clock run-in signal;
- a synchronizing portion for receiving said sliced data from said slicer, wherein said synchronizing portion synchronizes said sliced data with an internal clock signal to produce synchronized sliced data and wherein said internal clock signal has a frequency higher than a frequency of said analog clock run-in signal;
- an edge detecting portion for receiving said synchronized sliced data, for detecting rising edges of pulses of said synchronized sliced data, and for outputting an edge detection signal which comprises pulses that respectively correspond to said rising edges;
- a clock generator for receiving said edge detection signal from said edge detecting portion and for generating a detection clock signal based on said pulses of said edge detection signal;
- and
- a data detecting portion for receiving said synchronized sliced data from said synchronizing portion and said detection clock signal and for detecting said digital data contained in said vertical blanking period by synchronizing said synchronized sliced data according to said detection clock signal.
An apparatus for detecting digital data contained in a vertical blanking period of a received composite video signal based on an analog clock run-in signal which has a constant frequency and which is contained in said vertical blanking period of said received composite video signal, said apparatus comprising:
- a slicer for generating a slicing reference signal based on said analog clock run-in signal, for slicing said analog clock run-in signal by using said slicing reference signal, and for outputting sliced data according to said slicing of said analog clock run-in signal;
- a synchronizing portion for receiving said sliced data from said slicer, wherein said synchronizing portion synchronizes said sliced data with an internal clock signal to produce synchronized sliced data and wherein said internal clock signal has a frequency higher than a frequency of said analog clock run-in signal;
- an edge detecting portion for receiving said synchronized sliced data, for producing a first output signal based on said synchronized sliced data, for detecting rising edges of pulses of said synchronized sliced data, and for outputting an edge detection signal which comprises pulses that respectively correspond to said rising edges;
- a clock generator for receiving said edge detection signal from said edge detecting portion and for generating a detection clock signal based on said pulses of said edge detection signal;
- and
- a data detecting portion for receiving said detection clock signal and at least one of said synchronized sliced data from said synchronizing portion and said first output signal from said edge detecting portion and for detecting said digital data contained in said vertical blanking period by synchronizing said at least one of said synchronized sliced data and said first output signal according to said detection clock signal.
Dependencies are inferred from the claim text.